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After cmos battery replacement, dell 490 won't boot

Posted by Nancy Baughman on

  • Larry Ng
    Larry Ng Nov 19, 2020

    that battery makes the NVRAM hold the BIOS configs.
    when replaced this data is gone now.
    so go to the PCs bios.
    power on, and hammer F2 key, (bios hot key)
    then in the menus there pick reset BIOS defaults. done !
    now go to nic network same BIOS pages.
    turn off PXE but enable NIC do not enable PXE.
    then in same menus, go to boot order
    make the HDD first. in list
    it now boots.

    assumes battery not put in backwards.

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Tom Chichester

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  • Dell Master
  • 60,188 Answers

Possibly incorrect battery installation

Posted on Nov 09, 2020

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